If the user is the type of person who wants to understand WHY and how much changing some of the loading variables changes the resulting pressure and velocity, then using QuickLOAD will be interesting and educational, which will enhance his/her safety as well as enjoyment.

On the other hand, if the user is the type of person who is really just looking for a way to make bullets go even faster than the reloading data in the manuals, then it would be dangerous, because it is not a perfect simulation of the internal ballistics. (Not meaning to insult the OP; remember that a lot of people will read this post.)